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2010
CA08103002Z-EN
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Symbol
Meaning
DF
Duty factor
I
cm
Rated short-circuit making capacity
I
cn
Rated short-circuit breaking capacity
I
cs
Rated service short-circuit breaking capacity
I
cu
Rated ultimate short-circuit breaking capacity
I
cw
Rated short-time withstand current
I
Δn
Response value of earth-fault release
I
e
Rated operational current
I
g
Response value of earth-fault release
I
i
Response value of non-delayed short-circuit release
I
sc
Transformer initial short-circuit AC current
I
L
Load monitoring response value
I
n
Rated operational current
I
NT
Transformer rated operational current
I
PK
Rated peak withstand current
I
q
Rated conditional short-circuit current
I
r
Overcurrent release set value
I
rm
Response value of non-delayed short-circuit release
I
rmf
Response value of fixed, non-delayed short-circuit release
I
rmv
Response value of short-time delayed short-circuit release
I
sd
Response value of short-time delayed short-circuit release
I
T
Response value of earth-fault release
I
th
Conventional free air thermal current
I
the
Conventional thermal current of enclosed devices
I
u
Rated uninterrupted current
S
NT
Transformer rating
t
g
Delay time when the earth-fault release trips
t
r
Delay time when the overload release responds
t
T
Delay time when the earth-fault release trips
t
v
Time delay of short-circuit release response
U
c
Rated excitation voltage
U
e
Rated operational voltage
U
imp
Rated insulation voltage
U
imp
Rated surge voltage invariability
u
k
Transformer short-circuit voltage
U
s
Rated control voltage
Meaning
Symbol
Conventional free air thermal current
I
th
Conventional thermal current of enclosed devices
I
the
Delay time when the earth-fault release trips
t
g
Delay time when the earth-fault release trips
t
T
Delay time when the overload release responds
t
r
Load monitoring response value
I
L
Overcurrent release set value
I
r
Rated conditional short-circuit current
I
q
Rated control voltage
U
s
Rated excitation voltage
U
c
Rated insulation voltage
U
imp
Rated operational current
I
e
Rated operational current
I
n
Rated operational voltage
U
e
Rated peak withstand current
I
PK
Rated service short-circuit breaking capacity
I
cs
Rated short-circuit breaking capacity
I
cn
Rated short-circuit making capacity
I
cm
Rated short-time withstand current
I
cw
Rated surge voltage invariability
U
imp
Rated ultimate short-circuit breaking capacity
I
cu
Rated uninterrupted current
I
u
Response value of earth-fault release
I
Δn
,
I
g
,
I
T
Response value of fixed, non-delayed short-circuit release
I
rmf
Response value of non-delayed short-circuit release
I
i
Response value of non-delayed short-circuit release
I
rm
Response value of short-time delayed short-circuit release
I
rmv
Response value of short-time delayed short-circuit release
I
sd
Time delay of short-circuit release response
t
v
Transformer initial short-circuit AC current
I
sc
Transformer rated operational current
I
NT
Transformer rating
S
NT
Transformer short-circuit voltage
u
k
Glossary of terms
Symbols used in technical data and formulae